MAX3286 Datasheet, PDF (1/28 Pages) Maxim Integrated Products – 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers

19-1550; Rev 6; 11/04
3.0V ^to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
General Description
The MAX3286/MAX3296 series of products are high-
speed laser drivers for fiber optic LAN transmitters opti-
mized for Gigabit Ethernet applications. Each device
contains a bias generator, laser modulator, and com-
prehensive safety features. Automatic power control
(APC) adjusts the laser bias current to maintain aver-
age optical power at a constant level, regardless of
changes in temperature or laser properties. For lasers
without a monitor photodiode, these products offer a
constant-current mode. The circuit can be configured
for use with conventional shortwave (780nm to 850nm)
or longwave (1300nm) laser diodes, as well as vertical-
cavity surface-emitting lasers (VCSELs).
The MAX3286 series (MAX3286–MAX3289) is opti-
mized for operation at 1.25Gbps, and the MAX3296
series (MAX3296–MAX3299) is optimized for 2.5Gbps
operation. Each device can switch 30mA of laser mod-
ulation current at the specified data rate. Adjustable
temperature compensation is provided to keep the opti-
cal extinction ratio within specifications over the operat-
ing temperature range. This series of devices is
optimized to drive lasers packaged in low-cost TO-46
headers. Deterministic jitter (DJ) for the MAX3286 is
typically 22ps, allowing a 72% margin to Gigabit
Ethernet DJ specifications.
These laser drivers provide extensive safety features to
guarantee single-point fault tolerance. Safety features
include dual enable inputs, dual shutdown circuits, and
a laser-power monitor. The safety circuit detects faults
that could cause dangerous light output levels. A pro-
grammable power-on reset pulse initializes the laser
driver at startup.
The MAX3286/MAX3296 are available in a compact, 5mm
✕ 5mm, 28-pin QFN or thin QFN package; a 5mm ✕ 5mm,
32-pin TQFP package; or in die form. The MAX3287/
MAX3288/MAX3289 and MAX3297/MAX3298/MAX3299
are available in a 16-pin TSSOP-EP package.
Applications
Gigabit Ethernet Optical Transmitter
Fibre Channel Optical Transmitter
ATM LAN Optical Transmitter
Features
♦ 7ps Deterministic Jitter (MAX3296)
22ps Deterministic Jitter (MAX3286)
♦ +3.0V to +5.5V Supply Voltage
♦ Selectable Laser Pinning (Common Cathode or
Common Anode) (MAX3286/MAX3296)
♦ 30mA Laser Modulation Current
♦ Temperature Compensation of Modulation Current
♦ Automatic Laser Power Control or Constant
Bias Current
♦ Integrated Safety Circuits
♦ Power-On Reset Signal
♦ QFN and Thin QFN Packages Available
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3286CTI+
0°C to +70°C
28 Thin QFN
(5mm x 5mm)****
MAX3286CGI
0°C to +70°C
28 QFN
(5mm x 5mm)***
MAX3286CHJ
0°C to +70°C
32 TQFP
(5mm x 5mm)
Ordering Information continued at end of data sheet.
*Dice are designed to operate from T_J = 0°C to +110°C, but
are tested and guaranteed only at T_A = +25°C.
**Exposed pad.
***Package Code: G2855-1
****Package Code: T2855-7
+Denotes Lead-Free Package.
Pin Configurations
TOP VIEW
FAULT 1
+
FAULT 2
POR 3
GND 4
EN 5
EN 6
PORDLY 7
MAX3286
MAX3296
21 BIASDRV
20 SHDNDRV
19 GND
18 MON
17 MD
16 POL
15 POL
Typical Application Circuits and Selector Guide appear at
end of data sheet.
THIN QFN*
*Exposed pad is connected to GND.
Pin Configurations continued at end of data sheet.
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